**Core Concept**
The prostatic urethra is a part of the male urethra that passes through the prostate gland. It is characterized by being the widest and most dilatable part of the entire male urethra due to its embryological origin from the urogenital sinus.

**Why the Correct Answer is Right**
The prostatic urethra has a unique characteristic due to the presence of the verumontanum, a mucosal elevation that houses the openings of the ejaculatory ducts. This structure also contains the prostatic utricle, a small depression where the ducts of the prostate gland open into the urethra. The prostatic urethra is also lined by a mucous membrane that produces prostatic fluid, which contributes to semen.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided.
**Option B:** This option is not provided.
**Option C:** This option is not provided.
**Option D:** This option is not provided.

**Clinical Pearl / High-Yield Fact**
One important point to remember is the location of the verumontanum, which is a key landmark during transurethral resection of the prostate (TURP) surgery. The surgeon must be careful to avoid damaging this structure to prevent complications.

**Correct Answer:** A.